Bloom

A wall of flags, drawn in outline. Colour spreads from one flag.

1. Tap an outline that touches colour (they breathe blue) and name it from four. Flags side by side always look alike, and are never the same.
2. Right: it blooms into its true colours. Fully enclosed gaps fill themselves. A ✦ tile bursts open a whole patch.
3. Wrong: the streak ends and a neighbouring flag fades back to outline. A shield, earned every 5 right in a row, absorbs it. Every 10 in a row bursts too.
4. Pan and zoom freely, as far in or out as you like. Neighbours are your clues.